9/23 Bell RingerStep 1: Get out HW and post questions

Step 2: Name angles 1, 2, 3 and 4 in three different ways each.

HOMEWORK: Collinear, Coplanar, Parallel and Perpendicular WS AND FINISH YOUR VOCAB SHEET!!!!

DGC

RA

B

SX

12

3 4

9/23 News and Notes

• All quizzes made up? Gradebook closes today!

• Homework checked?

• Plan for next week: Monday=Creating complex drawings, Tuesday=Review, Wednesday=Test, Thursday=Mastery Checkpoint!

9/23 Agenda

I CAN identify collinear and coplanar points, parallel and perpendicular lines.

1. General Word Knowledge

2. 1 Example – Writing geometry sentences

3. Guided Practice – Convert the following to geometry sentences!

4. Independent Practice

New Material

• Today we will talk more about point and line relationships in 2-D space.

• What does it mean for two teachers to be coworkers?– Work together– Work on the same projects, do similar things.

New Material, cont.

• Based on your understanding of what a coworker is, write down your own definition of what it means for 2 points to be collinear:

• Now write down what you think it means for two points or lines to be coplanar:

New Material, cont.

• Now think back to the Chicago Map. Recall that it is set up like a coordinate plane.

• Do 79th and 95th ever intersect (cross each other)?

• So what are they?– PARALLEL LINES NEVER INTERSECT

New Material, cont.

• What about 79th and Pulaski? How do they intersect?– They intersect at right angles

• Two angles that intersect at a 90° angle are PERPENDICULAR LINES.

Pause

• Your job is to use today’s material to fill in your vocabulary over the weekend.

1 Example

• Give examples of:

• Collinear points

• Coplanar points

• Non-collinear points

• Non-coplanar points

A

D

B

C

E G F

H K J

XR

1 Example

• Give examples of:

• What lines are // ?

EF // HJ

• What lines are ?

EF GK and HJ GK

A

D

B

C

E G F

H K J

XR

Now write a sentence that details the relationship between elements

• EF and HP• In words:

EF is parallel to HP

• In math notation:

EF // HP

A

D

B

C

ER F

HK P

OT

Now write a sentence that details the relationship between elements

• EF and RK• In words:

EF is perpendicular to RK

• In math notation:

EF RK

A

D

B

C

ER F

HK P

OT

Now write a sentence that details the relationship between elements

• R and H

R and H are coplanar• T and K

T and K are noncoplanar• H and K

H and K are collinear

A

D

B

C

ER F

HK P

OT

• P and E

P and E are noncollinear

Independent Practice

• You now have the rest of class to work on the Independent Practice.

• Golden Ticket Draw for 2 Bonus HW Credits!!!